Design and Performance Evaluation of Frequency Compression Algorithm for Marathi Hearing Aid Users

  • Prashant G. Patil
  • Arun K. Mittra
  • Vijay S. Chourasia
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 624)


High frequency hearing loss for hearing aid user is hurdle for speech recognition in different background speaker–listener environment. In North Maharashtra region, patient suffered from moderate hearing loss at high frequency is unable to understand consonants and some vowels. In Marathi language, more confusing consonants are difficult to understand which will confuse HA user. Many Marathi words start with these confusing words. To design a hearing aid, we need to control and limit parameters like gain, compression time constants, processing attack time, compression ratios which clears that fast processing time will increase objectively speech intelligibility and slow processing time affect on sound quality. In this study, we designed MATLAB-based digital hearing aids according to the need of user. This digital hearing aid will fulfil all requirements of hearing aid users to limit the gain, frequency shaping of speech signal. In this method, speech signal is processed for different types of hearing impaired people which will make more audible for them. 1730 pre-processed Marathi sound recordings recorded in different background conditions are differing in parameters like compression ratio, compression speed and signal-to-noise ratio. Experimentation results show that all listeners are recognizing Marathi vowels and consonants very well in all background conditions.


Hearing aid High frequency Hearing loss Marathi vowels Frequency compression 



This research work was carried out at the Priyadarshini Deaf Residential School, Shirpur Dist-Dhule (India). We have obtained all ethical approvals from an appropriate ethical committee of institutional review board. If any issue arises hereafter then we will be solely responsible. The scientific responsibility is assumed by the authors. The institute had given the researcher permission to use our data as part of their experimental study. Institute have no objection to publish the experimental data in conference or journal paper.


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Copyright information

© Springer Nature Singapore Pte Ltd. 2018

Authors and Affiliations

  • Prashant G. Patil
    • 1
  • Arun K. Mittra
    • 1
  • Vijay S. Chourasia
    • 1
  1. 1.Department of Electronics EngineeringManoharbhai Patel Institute of Engineering & TechnologyGondiaIndia

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